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authorJeremy Kerr <jk@ozlabs.org>2013-10-25 16:06:50 +0800
committerJeremy Kerr <jk@ozlabs.org>2013-11-14 15:33:01 +1100
commit9670732fd1a67ae83cbc5e0c48792231e6a0dcb3 (patch)
tree9f29a6cb689a8afcec513ec89d1e33b81ab8c22e /ui/ncurses/nc-config.c
parentbdcb1f9712f9e99ff1f72497387b34e68585523c (diff)
downloadtalos-petitboot-9670732fd1a67ae83cbc5e0c48792231e6a0dcb3.tar.gz
talos-petitboot-9670732fd1a67ae83cbc5e0c48792231e6a0dcb3.zip
ui/ncurses/nc-config: Draw config form into a scrollable pad
Currently, when the config form is larger than the screen size, the form fails to draw. This change draws the config screen onto a pad instead, which we can scroll. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'ui/ncurses/nc-config.c')
-rw-r--r--ui/ncurses/nc-config.c74
1 files changed, 70 insertions, 4 deletions
diff --git a/ui/ncurses/nc-config.c b/ui/ncurses/nc-config.c
index 49f2e2f..0f35702 100644
--- a/ui/ncurses/nc-config.c
+++ b/ui/ncurses/nc-config.c
@@ -43,9 +43,13 @@ struct config_screen {
struct nc_scr scr;
struct cui *cui;
struct nc_widgetset *widgetset;
+ WINDOW *pad;
+
bool exit;
void (*on_exit)(struct cui *);
+ int scroll_y;
+
int label_x;
int field_x;
int network_config_y;
@@ -89,6 +93,16 @@ static struct config_screen *config_screen_from_scr(struct nc_scr *scr)
return config_screen;
}
+static void pad_refresh(struct config_screen *screen)
+{
+ int y, x, rows, cols;
+
+ getmaxyx(screen->scr.sub_ncw, rows, cols);
+ getbegyx(screen->scr.sub_ncw, y, x);
+
+ prefresh(screen->pad, screen->scroll_y, 0, y, x, rows, cols);
+}
+
static void config_screen_process_key(struct nc_scr *scr, int key)
{
struct config_screen *screen = config_screen_from_scr(scr);
@@ -98,7 +112,7 @@ static void config_screen_process_key(struct nc_scr *scr, int key)
if (screen->exit)
screen->on_exit(screen->cui);
else if (handled)
- wrefresh(screen->scr.main_ncw);
+ pad_refresh(screen);
}
static void config_screen_resize(struct nc_scr *scr)
@@ -112,7 +126,7 @@ static int config_screen_post(struct nc_scr *scr)
struct config_screen *screen = config_screen_from_scr(scr);
widgetset_post(screen->widgetset);
nc_scr_frame_draw(scr);
- wrefresh(scr->main_ncw);
+ pad_refresh(screen);
return 0;
}
@@ -486,11 +500,50 @@ static void config_screen_setup_widgets(struct config_screen *screen,
cancel_click, screen);
}
+static void config_screen_widget_focus(struct nc_widget *widget, void *arg)
+{
+ struct config_screen *screen = arg;
+ int w_y, w_height, s_max;
+
+ w_y = widget_y(widget);
+ w_height = widget_height(widget);
+ s_max = getmaxy(screen->scr.sub_ncw);
+
+ if (w_y < screen->scroll_y)
+ screen->scroll_y = w_y;
+
+ else if (w_y + w_height + screen->scroll_y > s_max - 1)
+ screen->scroll_y = 1 + w_y + w_height - s_max;
+
+ else
+ return;
+
+ pad_refresh(screen);
+}
+
+
void config_screen_update(struct config_screen *screen,
const struct config *config,
const struct system_info *sysinfo)
{
bool repost = false;
+ int height;
+
+ /* The size of the pad we'll need depends on the number of interfaces.
+ *
+ * We use N_FIELDS (which is quite conservative, as some fields share
+ * a line) as a base, then add 3 (as the network select field is
+ * takes 3 lines), and n_interfaces (as the network interface field
+ * has n_interfaces lines).
+ */
+ height = N_FIELDS + 3;
+ if (sysinfo)
+ height += sysinfo->n_interfaces;
+ if (!screen->pad || getmaxx(screen->pad) < height) {
+ if (screen->pad)
+ delwin(screen->pad);
+ screen->pad = newpad(height, COLS);
+ }
if (screen->widgetset) {
widgetset_unpost(screen->widgetset);
@@ -499,7 +552,9 @@ void config_screen_update(struct config_screen *screen,
}
screen->widgetset = widgetset_create(screen, screen->scr.main_ncw,
- screen->scr.sub_ncw);
+ screen->pad);
+ widgetset_set_widget_focus(screen->widgetset,
+ config_screen_widget_focus, screen);
if (!config || !sysinfo) {
config_screen_setup_empty(screen);
@@ -513,7 +568,15 @@ void config_screen_update(struct config_screen *screen,
if (repost)
widgetset_post(screen->widgetset);
- wrefresh(screen->scr.main_ncw);
+ pad_refresh(screen);
+}
+
+static int config_screen_destroy(void *arg)
+{
+ struct config_screen *screen = arg;
+ if (screen->pad)
+ delwin(screen->pad);
+ return 0;
}
struct config_screen *config_screen_init(struct cui *cui,
@@ -524,6 +587,7 @@ struct config_screen *config_screen_init(struct cui *cui,
struct config_screen *screen;
screen = talloc_zero(cui, struct config_screen);
+ talloc_set_destructor(screen, config_screen_destroy);
nc_scr_init(&screen->scr, pb_config_screen_sig, 0,
cui, config_screen_process_key,
config_screen_post, config_screen_unpost,
@@ -545,5 +609,7 @@ struct config_screen *config_screen_init(struct cui *cui,
config_screen_update(screen, config, sysinfo);
+ wrefresh(screen->scr.main_ncw);
+
return screen;
}
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